UL 1008:8ED 2014-12

PREFACE
1 Scope
2 General Requirements
3 Definitions
4 Characteristics
5 Product Information
6 Construction Requirements
7 Performance Requirements
8 Service Equipment Requirements
9 Test Requirements - General
10 Test Requirements - Routine Tests
Annex A1 - Normative references
Annex A2 - Informative references
Annex B (informative) - French translation of markings
Annex C (informative) - Spanish translation of markings
Annex D (normative) - Bypass/Isolation switches
Annex E (normative) - Transfer switches for fire pump service
Annex F (Normative in Canada) (Informative in Mexico and
        the United States) - Hybrid Transfer Switches
Annex G (normative) - Softload Transfer Switches
Annex H (Normative in Mexico and the United States) (Informative
        in Canada) - Instrumentation and Calibration of High
        Capacity Circuits
Annex I (informative) - Sample Markings
Annex J (normative) - Inlet Assemblies for Transfer Switch
        Equipment

This revision of ANSI/UL 1008 is being issued to incorporate the following changes: Revision to Add Recreational Vehicle Transfer Switches to the Scope of UL 1008 Revisions to Address the Grounding and Bonding of Neutral Circuits Revision to the Overload, Endurance, and Short Circuit Testing Miscellaneous Revisions Regarding Inlet Assemblies, Mechanical Interlocking of Single Pole Inlets and Readily Accessible Service Disconnect Switches Revisions Regarding the Use of "Circuit Breaker Based" Transfer Switches and Compliance with Service Disconnecting Requirements Revision for Consistency with UL 50E Rain Test Revisions to Annex E to Cover Freestanding Complete Packaged Fire Pump Power Transfer Units Revisions to Address System Available Fault Calculations for Momentary Paralleling Situations Clarification of Marking Requirements Revised Requirements for Monitoring the Temperature on Inlets

This standard applies to the following types of transfer switches that have a maximum rating of 1000 volts for use in non-hazardous locations, in accordance with Annex a1, Item 1: a)Automatic transfer switches; b)Manual or non-automatic transfer switches; c) Closed transition transfer switches; d)Hybrid transfer switches; e)Transfer switches for fire pumps; f)Bypass/isolating switches; g)Softload transfer switches; h)Transfer switches intended for use as service equipment; i)Transfer switches intended for use in mobile/portable applications such as recreational vehicles, motor homes, camping trailers, and mobile health care facilities; and j)In Mexico and the United States, branch circuit emergency lighting transfer switches (BCELTS).